Weather Alerts-

Avoid the subject event as per the instructions

Chicago - IL, US, National Weather Service

DuPage County

...Patchy Dense Fog Possible Early This Morning... Pockets of fog, locally reducing visibilities under one half mile, will be possible early this morning. If traveling, be prepared for sudden changes in visibility. If you encounter fog, slow down, maintain a safe following distance, and use your low beam headlights.